Cassandra synchronization

[Heman]

Hi All,

We have installed Hybrid runtime on multiple DC's and flavors are EKS & VMWare (GKE on-prem), here looking for cassandra synchronization between multiple DC's

1) DC1 (EKS environment) - One of the Cassandra pod instance (apigee-cassandra-default-0) of IP should configure under Cassandra stanza in Yaml file and apply in cluster level again on DC2 (VMWare)

DC2(VMWare) -
cassandra:
multiRegionSeedHost: DC1-> apigee-cassandra-default-0 IP
datacenter: "dc-anthos"
rack: "ra-1"
hostNetwork: true
Is the only change required in Yaml file?
How the IP address of DC1-> apigee-cassandra-default-0 IP will get visibility in DC2 here?

2) Ref link :https://cloud.google.com/apigee/docs/hybrid/v1.6/multi-region#eks and below statement,
Open Cassandra ports 7000 and 7001 between Kubernetes clusters across all regions to enable worker nodes across regions and datacenters to communicate

These ports need to be enabled between DC's is enough ?
How to establish the connectivity between DC1 & DC2 ?if you have any document of link of network level activities, please share to us.

Regards

Heman 

[strebel · Accepted solution]

The requirement is so have L3/4 level connectivity between DC1 and DC2. Meaning your Cassandra nodes should be able to reach all Cassandra nodes in the other cluster(s). This includes the mentioned Firewalls/Ports for 7000 and 7001 as well as the routing via the interconnect mechanism you use between your VMWare and EKS clusters (e.g. Direct Connect or VPN). The implementation of this is specific to your network topology.

[Heman]

Thanks for the reply ..

Also I'm referring below links for Cassandra synchronization .

https://github.com/apigee/ahr/wiki/gke-eks-aks-multi-cloud-small-top-1.4-ahr-profile-quick-start

https://cloud.google.com/apigee/docs/hybrid/v1.6/multi-region

https://cloud.google.com/apigee/docs/hybrid/v1.6/cassandra-production